Influence of Expansive Additives on Hydration of C_3A;

Research on hydration of magnesium oxide from roasting hydrated magnesium chloride;

Influence of additives on performance and hydration process of cement;

The experiments show that a few calcium chloride will result in the increase of the fluidity loss of portland cement paste,Calcium chloride can decreaae the dissolution rate of dihydrate gypsum in calcium hydroxide saturated solution and increase its dissolubility.

The physical constitution and hydrate of this cement with high volume fly-ash and slag wastage is detected by scanning electron microscope(SEM), X-ray diffraction(XRD) and differential thermal analysis(DTA) etc.

By using scanning electron microscope(SEM) the hydrate of highly free calcium oxide(f CaO)cements is studied,and the distribution and crystalline characteristics of calcium hydroxide in cement are investigated and the different boundary characteristics between calcium hydroxide with CSH at early hydration stage and later stage as well.

Effect of water-binder ratio and composition on the hydration products and hydration degree of complex shrinkage-compensating binders;

The effects of mineral materials, grinded blast furnace slag (S), high-calcium fly ash (HF), desulfurized gypsum (DG), calcined desulfurized gypsum (CG) and sodium sulfate (NS) on the hydration degree of cement pastes are researched according to testing results of the chemical shrinkage, the hydration heat and the compressive strength.

In this paper, the modeling and simulation process of CEMHYD3D is analyzed, the hydration process of CCRL Cement 133 at different water-to-cement ratios is simulated with CEMHYD3D, and several properties, such as the hydration heat, the hydration degree, the variation of the reactant and the product are predicted.

Utilization Status, Prospects and Feasibility about Gas Hydrocarbon Hydrate as Replaceable Resources;

This paper introduces the general situation of Daniudi Gas field of Erdos and its gas gathering technique, and advances some measures for preventing the formation of gas hydrate.

After analytical research on plugging during the gath- ering and transferring process for gas wells in Yulin gas field,natural gas is found to easily become hydrates under high pressure and low temperature,resulting in the plug- ging of surface pipelines.